CN114032627A - Negative ion moisture absorption health care functional fiber with skin-core structure and preparation method thereof - Google Patents
Negative ion moisture absorption health care functional fiber with skin-core structure and preparation method thereof Download PDFInfo
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- CN114032627A CN114032627A CN202111543154.1A CN202111543154A CN114032627A CN 114032627 A CN114032627 A CN 114032627A CN 202111543154 A CN202111543154 A CN 202111543154A CN 114032627 A CN114032627 A CN 114032627A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
- D01F11/08—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
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Abstract
The invention relates to the field of fiber materials, and discloses an anion moisture absorption health care functional fiber with a skin-core structure and a preparation method thereof, wherein the fiber is formed into the skin-core structure by a porous hydrophobic skin layer and a hydrophilic core layer; the porous hydrophobic skin layer is PET, PP or PA, the hydrophilic core layer is hydrophilic polyester containing a humidity storage cavity, and negative ion powder is contained in the humidity storage cavity. The anion moisture absorption health care functional fiber has the characteristics of firm and washable anion powder load, high anion release efficiency and good skin adhesion.
Description
Technical Field
The invention relates to the field of fiber materials, in particular to a negative ion moisture absorption health care functional fiber with a skin-core structure and a preparation method thereof.
Background
The anion material is a powder material capable of generating air anions and generally comprises rare earth elements, tourmaline powder and other substances. Among them, tourmaline is the most typical negative ion powder, and when the pressure or temperature applied to the surface of the tourmaline crystal changes, it causes the potential difference of the tourmaline crystal to ionize the surrounding air, and the hit electrons act on the adjacent water and oxygen molecules and convert it into negative ions. The naturally produced negative oxygen ions have health promoting effect and are beneficial to human health.
With the development of technology and the improvement of the quality of daily life of people, various products with health care function, such as clothes, plates, coatings and the like capable of releasing anions, compounded with anion powder are gradually developed. For fabrics such as clothes and the like compounded with anion powder, the anion powder is generally added into a polymer melt and then spun to obtain functional fibers compounded with anion powder, and then the functional fibers are made into various fabrics; or the negative ion slurry is applied to the surface of the fabric by means of fabric post-impregnation treatment. However, the fabrics obtained by the two methods have limited release efficiency of negative ions in the actual use process, so that the health care effect is not obvious. In addition, for the immersion treatment process, such as the solution of CN201810406028.3, the negative ion powder is also easy to fall off during the subsequent use or washing process, which affects the health care effect. In addition, in the two modes, due to the addition of the anion powder, at least part of the powder can be fixed on the surface of the fiber, so that the surface of the fiber is rough and has burr feeling, and when the powder is used as a close-fitting fabric raw material, the skin-fitting performance is poor, so that the use experience of a user is poor.
In summary, in order to solve the above problems of the anion fabric products in the prior art, there is a need to develop an anion health care functional fiber with firm anion powder loading, high anion release efficiency and good skin-adhering property.
Disclosure of Invention
In order to solve the technical problems, the invention provides an anion moisture absorption health care functional fiber with a skin-core structure and a preparation method thereof. The anion moisture absorption health care functional fiber has a skin-core structure, wherein the skin layer is a porous hydrophobic structure, and the core layer is made of hydrophilic materials and contains a moisture storage cavity and anion powder. The fiber has the characteristics of firm and washable negative ion powder load, high negative ion release efficiency and good skin adhesion.
The specific technical scheme of the invention is as follows: a negative ion moisture absorption health care functional fiber with a skin-core structure comprises a skin-core structure consisting of a porous hydrophobic skin layer and a hydrophilic core layer; the porous hydrophobic skin layer is PET, PP or PA, the hydrophilic core layer is hydrophilic polyester containing a humidity storage cavity, and negative ion powder is contained in the humidity storage cavity.
The negative ion moisture absorption health care functional fiber is of a skin-core structure, wherein the skin layer is of a porous structure and is made of hydrophobic materials (PET, PP or PA), the core layer is of a hydrophilic material (hydrophilic polyester) and is provided with a tiny moisture storage cavity structure, and negative ion powder is contained in the moisture storage cavity. The above structure has the advantages that:
(1) the negative ion powder is firmly loaded and is washable: compared with the mode that the fabric is impregnated and treated to load the anion powder on the surface of the fabric in the prior art, the anion powder is loaded in the core layer of the fiber, so that the anion powder cannot be contacted with the outside, and is difficult to elute even if being washed by water.
(2) The anion release efficiency is high: one aspect is that: the process of releasing negative ions by the negative ion powder is as follows: in the case of a change in the external temperature and pressure, a potential difference between negative ion powder (e.g., tourmaline) crystals is caused, so that air is ionized, and the hit electrons are attached to adjacent water molecules and converted into air negative ions, i.e., negative ions (negative oxygen ions). It can be seen that the generation of negative ions requires the use of water molecules. However, in a common environment, water molecules in the air are too thin, and when the air is ionized, electrons are hit and cannot be smoothly converted into negative ions and released into the air due to the lack of water molecules capable of being attached at the adjacent positions of the electrons. Therefore, the anion releasing capacity of most of the current anion products is not fully utilized. In the invention, the skin layer is made of hydrophobic material and is provided with porous channels, the function of the skin layer is that moisture (humidity) contacted with the outside can be conducted into the core layer, and the core layer is made of hydrophilic material, so that the skin layer can store the moisture and provide favorable conditions for the negative ion powder to release negative ions. However, the hydrophilic polyester is an artificial synthetic fiber, and the hydrophilicity of the fiber is not as good as that of natural fibers such as viscose (cellulose), so the moisture absorption and moisture transmission performance is still poor. The reason for not adopting viscose fiber is that the spinning process is incompatible with the artificial synthetic fiber, and the skin-core structure can not be prepared. However, in the prior art, anion powder is attached to the hollow inner wall of the hollow fiber, but the fiber has low strength (hollow), and cannot meet some high-strength application scenes. In order to make the water content in the core layer as close to the negative ion powder as possible, the invention generates pores around the negative ion powder as a moisture storage cavity. Therefore, the moisture in the core layer can be smoothly enriched and separated out to the moisture storage cavity under the action of osmotic pressure, so that the surrounding humidity of the negative ion powder is higher. Secondly, the reason that the existing material containing the negative ion powder has low release efficiency is that the negative ion powder is wrapped in the material and lacks of release channels. In the invention, firstly, the negative ion powder in the core layer is accommodated in the humidity storage cavity, the surface of the humidity storage cavity is not tightly wrapped by the material, the skin layer has a porous structure, and the combination of the negative ion powder and the porous structure can provide a release channel for negative ions, so that the negative ion release efficiency is improved. Under the influence of the two factors, the fiber of the invention releases more negative ions under the same conditions (the negative ion powder is the same, and the content is the same).
(3) The skin-sticking property is good: as described in the background section, some prior art products have negative ion powder attached to the surface of the fiber or fabric, which can cause the surface of the fiber or fabric to be rough, have poor hand feeling, not smooth enough, have burr feeling, and are not suitable for being used as products directly contacting with skin. The anion powder is positioned in the core layer and cannot be in direct contact with the skin, so that the anion powder has good skin-adhering property. On the other hand, the reason why the skin layer is designed to be hydrophobic in the present invention is that the dryness of the surface of the fiber can be maintained, and if the skin layer is also made of a hydrophilic material, the skin layer may feel stuffy and wet when contacting the skin after absorbing a large amount of water, and the skin-contacting property is poor.
Preferably, the negative ion powder is tourmaline.
Preferably, the anion powder is 1-10 microns.
A preparation method of negative ion moisture absorption health care functional fiber comprises the following steps:
(1) and drying the anion powder, adding the anion powder into the alkali-soluble copolyester in a molten state according to the mass ratio of 1 (0.6-1.0), uniformly dispersing, cooling, solidifying, crushing and ball-milling to obtain the micron-sized anion powder @ alkali-soluble copolyester particles with the core-shell structure.
(2) And melting and blending the anion powder @ alkali-soluble copolyester particles and hydrophilic polyester by a double-screw extruder according to the mass ratio of 5-15:100, extruding and granulating, and drying to obtain the core layer slice.
(3) Melting and blending the alkali-soluble copolyester and PET, PP or PA by a double-screw extruder according to the mass ratio of 30-40:100, extruding and granulating, and drying to obtain the skin layer slice.
(4) And melting the skin layer slice and the core layer slice, performing melt spinning through different channels of a skin-core spinning device, and performing air cooling, drafting, heat setting and winding on the formed tows to obtain the skin-core structural fiber.
(5) And (3) carrying out alkali treatment on the skin-core structure fiber to remove alkali-soluble copolyester, and carrying out ultrasonic cleaning and drying to obtain the negative ion moisture absorption health care functional fiber with the skin-core structure.
The principle of the above preparation method of the present invention can be broadly summarized as follows: in the step (1), the alkali-soluble copolyester is wrapped on the surface of the anion powder to form a core-shell structure; blending the anion powder @ alkali-soluble copolyester particles and hydrophilic polyester to prepare a core layer slice in the step (2); blending the alkali-soluble copolyester with hydrophobic PET, PP or PA to prepare a skin layer slice in the step (3); step (4), carrying out conventional spinning to obtain a skin-core structure fiber; and (5) carrying out alkali treatment on the skin-core structure fiber to remove alkali-soluble copolyester in the fiber, thereby forming a porous structure in the skin layer, and finally obtaining the anion moisture absorption health care functional fiber with the skin-core structure in the core layer due to the dissolution of the alkali-soluble copolyester coated on the surface of the anion powder. In the method, the cortex porous structure and the core layer moisture storage cavity are generated by skillfully utilizing the characteristic that the alkali-soluble copolyester is dissolved in alkali, and the method is simple, convenient and effective.
Preferably, in the step (1), the particle size of the anion powder @ alkali-soluble copolyester particle is 2-20 microns.
Preferably, in step (1), the alkali-soluble copolymer is polyethylene terephthalate containing 5 to 10 mol% of dimethyl isophthalate-5-sodium sulfonate-1 and 5 to 10 mol% of polyethylene glycol.
Preferably, in the step (4), the mass ratio of the skin layer slice to the core layer slice is (30:70) - (40: 60).
Preferably, in the step (4), the spinning temperature of the skin layer slice is 240-280 ℃, and the spinning temperature of the core layer slice is 270-290 ℃.
Preferably, in the step (5), the drawing temperature is 90-110 ℃, and the heat-setting temperature is 130-150 ℃.
Preferably, in the step (5), the alkali treatment is to immerse the core-sheath structure fiber in 0.5-1.5 wt% sodium hydroxide solution at 90-100 ℃ according to a bath ratio of 1:30-40, and perform ultrasonic vibration treatment for 1-2 h.
It should be noted that ultrasonic oscillation treatment and ultrasonic washing are required in the alkali treatment, so that sufficient penetration of alkali liquor or moisture into the fiber interior is ensured to achieve the alkali treatment and water washing.
Compared with the prior art, the invention has the following technical effects: the anion moisture absorption health care functional fiber has a skin-core structure, wherein the skin layer is a porous hydrophobic structure, and the core layer is made of hydrophilic materials and contains a moisture storage cavity and anion powder. The fiber has the characteristics of firm and washable negative ion powder load, high negative ion release efficiency and good skin adhesion.
Detailed Description
The present invention will be further described with reference to the following examples. The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
Example 1
(1) The tourmaline powder with the particle size of 1-5 microns is dried, added into alkali-soluble copolyester (6mol percent dimethyl isophthalate-5-sodium sulfonate-1 and 7mol percent polyethylene glycol polyethylene terephthalate) in a molten state according to the mass ratio of 1:1, uniformly dispersed, cooled, solidified, crushed and ball-milled to obtain the tourmaline @ alkali-soluble copolyester particles with the particle size of 2-10 microns.
(2) Melting and blending tourmaline @ alkali-soluble copolyester particles and hydrophilic polyester (polyethylene terephthalate with 5 mol% of sorbitol monomer) by a double-screw extruder according to the mass ratio of 10:100, extruding and granulating, and drying to obtain a core layer slice.
(3) Melting and blending the alkali-soluble copolyester and PET by a double-screw extruder according to the mass ratio of 35:100, extruding and granulating, and drying to obtain the skin layer slice.
(4) Melting the skin layer slice and the core layer slice according to the mass ratio of 35:65, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 270 ℃, and the spinning temperature of the core layer slice is 280 ℃; and carrying out air cooling, 100 ℃ drafting, 140 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber.
(5) The skin-core structure fiber is dipped in 1 wt% sodium hydroxide solution at 95 ℃ according to the bath ratio of 1:35, and is subjected to ultrasonic oscillation treatment for 60 min. And taking out the fiber after alkali treatment, performing ultrasonic cleaning, and drying in a 60 ℃ oven to obtain the anion moisture absorption health care functional fiber with the skin-core structure, wherein the skin layer is a porous hydrophobic skin layer, the core layer contains hydrophilic polyester of a moisture storage cavity, and anion powder is contained in the moisture storage cavity.
Example 2
(1) The tourmaline powder of 5-10 microns is dried, added into alkali-soluble copolyester (polyethylene terephthalate containing 6 mol% dimethyl isophthalate-5-sodium sulfonate-1 and 7 mol% polyethylene glycol) in a molten state according to the mass ratio of 1:0.8, uniformly dispersed, cooled and solidified, and then crushed and ball-milled to obtain tourmaline @ alkali-soluble copolyester particles with the particle size of 10-20 microns.
(2) Melting and blending tourmaline @ alkali-soluble copolyester particles and hydrophilic polyester (polyethylene terephthalate with 5 mol% of sorbitol monomer) by a double-screw extruder according to the mass ratio of 5:100, extruding and granulating, and drying to obtain a core layer slice.
(3) Melting and blending the alkali-soluble copolyester and PP by a double-screw extruder according to the mass ratio of 30:100, extruding and granulating, and drying to obtain the skin layer slice.
(4) Melting the skin layer slice and the core layer slice according to the mass ratio of 30:70, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 265 ℃, and the spinning temperature of the core layer slice is 285 ℃; and carrying out air cooling, 95 ℃ drafting, 135 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber.
(5) The skin-core structure fiber is dipped in 0.5 wt% sodium hydroxide solution at 100 ℃ according to the bath ratio of 1:30, and is treated for 1h by ultrasonic oscillation. And taking out the fiber after alkali treatment, performing ultrasonic cleaning, and drying in a 60 ℃ oven to obtain the anion moisture absorption health care functional fiber with a skin-core structure, wherein the skin layer is a porous hydrophobic skin layer, the core layer is hydrophilic polyester containing a moisture storage cavity, and anion powder is contained in the moisture storage cavity.
Example 3
(1) The tourmaline powder of 5-10 microns is dried, added into alkali-soluble copolyester (polyethylene terephthalate containing 6 mol% dimethyl isophthalate-5-sodium sulfonate-1 and 7 mol% polyethylene glycol) in a molten state according to the mass ratio of 1:0.6, uniformly dispersed, cooled and solidified, and then crushed and ball-milled to obtain tourmaline @ alkali-soluble copolyester particles with the particle size of 10-20 microns.
(2) Melting and blending tourmaline @ alkali-soluble copolyester particles and hydrophilic polyester (polyethylene terephthalate with 5 mol% of sorbitol monomer) by a double-screw extruder according to the mass ratio of 15:100, extruding and granulating, and drying to obtain a core layer slice.
(3) Melting and blending the alkali-soluble copolyester and the PA by a double-screw extruder according to the mass ratio of 40:100, extruding and granulating, and drying to obtain the skin layer slice.
(4) Melting the skin layer slice and the core layer slice according to the mass ratio of 40:60, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 245 ℃, and the spinning temperature of the core layer slice is 285 ℃; and carrying out air cooling, 110 ℃ drafting, 150 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber.
(5) The skin-core structure fiber is dipped in 1.5 wt% sodium hydroxide solution at 100 ℃ according to the bath ratio of 1:40, and is treated for 2h by ultrasonic oscillation. And taking out the fiber after alkali treatment, performing ultrasonic cleaning, and drying in a 60 ℃ oven to obtain the anion moisture absorption health care functional fiber with a skin-core structure, wherein the skin layer is a porous hydrophobic skin layer, the core layer is hydrophilic polyester containing a moisture storage cavity, and tourmaline powder is contained in the moisture storage cavity.
Comparative example 1
Drying 5-10 microns of tourmaline, adding 3% of tourmaline into a PET spinning melt for melt spinning at 275 ℃, and performing air cooling, 110 ℃ drafting, 150 ℃ heat setting and winding on the formed tows to obtain the non-skin-core structure fiber containing tourmaline powder.
Comparative example 2
(1) Melting and blending 1-5 micron tourmaline powder and hydrophilic polyester (5 mol% sorbitol monomer polyethylene terephthalate) by a double-screw extruder according to the mass ratio of 5:100, extruding and granulating, and drying to obtain core layer slices.
(2) The PET chips were dried and used as skin layer chips.
(3) Melting the skin layer slice and the core layer slice according to the mass ratio of 35:65, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 270 ℃, and the spinning temperature of the core layer slice is 280 ℃; and performing air cooling, 100 ℃ drafting, 140 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber with the core layer containing the tourmaline powder.
Comparative example 3
(1) The tourmaline powder with the particle size of 1-5 microns is dried, added into alkali-soluble copolyester (6mol percent dimethyl isophthalate-5-sodium sulfonate-1 and 7mol percent polyethylene glycol polyethylene terephthalate) in a molten state according to the mass ratio of 1:1, uniformly dispersed, cooled, solidified, crushed and ball-milled to obtain the tourmaline @ alkali-soluble copolyester particles with the particle size of 2-10 microns.
(2) Melting and blending tourmaline @ alkali-soluble copolyester particles and hydrophilic polyester (polyethylene terephthalate with 5 mol% of sorbitol monomer) by a double-screw extruder according to the mass ratio of 10:100, extruding and granulating, and drying to obtain a core layer slice.
(3) The PET chips were dried and used as skin layer chips.
(4) Melting the skin layer slice and the core layer slice according to the mass ratio of 35:65, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 270 ℃, and the spinning temperature of the core layer slice is 280 ℃; and carrying out air cooling, 100 ℃ drafting, 140 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber.
(5) The skin-core structure fiber is dipped in 1 wt% sodium hydroxide solution at 95 ℃ according to the bath ratio of 1:35, and is subjected to ultrasonic oscillation treatment for 60 min. Taking out the fiber after alkali treatment, performing ultrasonic cleaning, and drying in a 60 ℃ oven to obtain the skin-core structure fiber containing tourmaline powder, wherein the skin layer is a hydrophobic skin layer, and the core layer is hydrophilic polyester containing tourmaline powder and contains a small amount of moisture storage cavities.
Comparative example 4
(1) Melting and blending 1-5 micron tourmaline powder and hydrophilic polyester (5 mol% sorbitol monomer polyethylene terephthalate) by a double-screw extruder according to the mass ratio of 5:100, extruding and granulating, and drying to obtain core layer slices.
(2) Melting and blending the alkali-soluble copolyester and PET by a double-screw extruder according to the mass ratio of 35:100, extruding and granulating, and drying to obtain the skin layer slice.
(3) Melting the skin layer slice and the core layer slice according to the mass ratio of 35:65, and then carrying out melt spinning through different channels of a skin-core spinning device, wherein the spinning temperature of the skin layer slice is 250 ℃, and the spinning temperature of the core layer slice is 280 ℃; and carrying out air cooling, 100 ℃ drafting, 140 ℃ heat setting and winding on the formed tows to obtain the skin-core structure fiber.
(4) The skin-core structure fiber is dipped in 1 wt% sodium hydroxide solution at 95 ℃ according to the bath ratio of 1:35, and is subjected to ultrasonic oscillation treatment for 60 min. Taking out the fiber after alkali treatment, performing ultrasonic cleaning, and drying in a 60 ℃ oven to obtain the skin-core structure fiber containing tourmaline powder, wherein the skin layer is a porous hydrophobic skin layer, and the core layer is hydrophilic polyester containing tourmaline powder.
Performance testing
The fibers obtained in example 1 and comparative examples 1 to 4 were subjected to negative ion release amount, moisture absorption, and hand test. The test method is as follows:
(1) emission amount of negative ions: the fibers of each case were woven into 30cm by 30cm size cloth with a gram weight of 200+1g/m2Respectively to be separately provided withThe detector is placed in a box body with the size of 50cm by 50cm, the detector is placed in the box body, the environment in the box body is controlled to be a standard environment condition, the box body is closed, and reading is carried out after 24 hours of keeping. The test was performed with multiple washes, with 5 and 10 washes being performed with the test being dried before the test after each wash.
(2) The fibers of each case were woven into 30cm by 30cm size cloth with a gram weight of 200+1g/m2The moisture regain was measured.
(3) The fiber surface of each case was touched with a hand and evaluated blindly.
The results are shown in the following table:
from the above table data, it can be seen that:
aspect of negative ion release amount: the unwashed fabric of example 1 had the highest negative ion release amount, and comparative example 1 was a common polyester fiber containing tourmaline, which had a negative ion release amount lower than that of example 1; in comparative example 2, since the skin layer does not have a porous structure, the release of negative ions is hindered, and the release amount of negative ions is the lowest; comparative example 3 is similar to comparative example 2, the skin layer has no porous structure, but the skin layer has a moisture storage cavity which can enrich moisture to promote the release of negative ions, so the data is better than that of comparative example 2; while comparative example 4 has a porous hydrophobic skin layer, but has no humidity storage chamber compared to example 1, and thus the data is inferior to example 1. In the aspect of washing resistance, in the embodiment 1 and the comparative examples 2 to 4 with the skin-core structure, the tourmaline powder is not easy to elute due to the coating of the skin layer, and the negative ion release amount influence is small, especially in the comparative examples 2 and 3, the tourmaline powder has higher load fastness due to the fact that the skin layer is not porous. The comparative example 1 has no core-skin structure, and the tourmaline powder on the surface layer of the fiber is easily eluted, thereby affecting the release amount of negative ions.
Moisture regain: the moisture regain indicates the moisture absorption of the fabric, and it can be seen from the above table that the moisture absorption of example 1 is the best, while the moisture regain of the conventional polyester fiber of comparative example 1 is the worst; comparative example 2 has a hydrophilic core layer, so the hygroscopicity is better than that of comparative example 1; comparative example 3 contains a moisture storage chamber on the basis of comparative example 2, and the moisture absorption is further improved; the skin layer of comparative example 4 has a porous structure to introduce moisture into the core layer, and thus the moisture absorption is inferior to that of example 1.
Hand feeling: in the fibers of example 1 and comparative examples 2 to 4, the tourmaline is positioned in the core layer, so the fibers have smooth hand feeling, and the surface layer of the fiber of comparative example 1 also contains tourmaline, so the surface of the fiber is rough and the hand feeling is poor.
Claims (10)
1. The utility model provides a negative ion moisture absorption health care function fibre of skin-core structure which characterized in that: a skin-core structure is formed by a porous hydrophobic skin layer and a hydrophilic core layer; the porous hydrophobic skin layer is PET, PP or PA, the hydrophilic core layer is hydrophilic polyester containing a humidity storage cavity, and negative ion powder is contained in the humidity storage cavity.
2. The negative ion moisture-absorbing health-care functional fiber according to claim 1, wherein: the anion powder is tourmaline.
3. The negative ion moisture absorption health care functional fiber according to claim 1 or 2, characterized in that: the negative ion powder is 1-10 microns.
4. A method for preparing the anion moisture absorption health care functional fiber according to any one of claims 1 to 3, which is characterized by comprising the following steps:
(1) drying the anion powder, adding the anion powder into the alkali-soluble copolyester in a molten state according to the mass ratio of 1 (0.6-1.0), uniformly dispersing, cooling, solidifying, crushing and ball-milling to obtain micron-sized anion powder @ alkali-soluble copolyester particles with a core-shell structure;
(2) melting and blending the anion powder @ alkali-soluble copolyester particles and hydrophilic polyester by a double-screw extruder according to the mass ratio of 5-15:100, extruding and granulating, and drying to obtain core layer slices;
(3) melting and blending the alkali-soluble copolyester and PET, PP or PA by a double-screw extruder according to the mass ratio of 30-40:100, extruding and granulating, and drying to obtain a skin layer slice;
(4) melting the skin layer slice and the core layer slice, performing melt spinning through different channels of a skin-core spinning device, and performing air cooling, drafting, heat setting and winding on the formed tows to obtain skin-core structural fibers;
(5) and (3) carrying out alkali treatment on the skin-core structure fiber to remove alkali-soluble copolyester, and carrying out ultrasonic cleaning and drying to obtain the negative ion moisture absorption health care functional fiber with the skin-core structure.
5. The method of claim 4, wherein: in the step (1), the particle size of the anion powder @ alkali-soluble copolyester particle is 2-20 microns.
6. The method of claim 4, wherein: in the step (1), the alkali-soluble copolyester is polyethylene terephthalate containing 5 to 10 mol% of dimethyl isophthalate-5-sodium sulfonate-1 and 5 to 10 mol% of polyethylene glycol.
7. The method of claim 4, wherein: in the step (4), the mass ratio of the skin layer slice to the core layer slice is (30:70) - (40: 60).
8. The method of claim 4, wherein: in the step (4), the spinning temperature of the skin layer slice is 240-280 ℃, and the spinning temperature of the core layer slice is 270-290 ℃.
9. The method of claim 8, wherein: in the step (5), the drawing temperature is 90-110 ℃, and the heat setting temperature is 130-150 ℃.
10. The method of claim 4, wherein: in the step (5), the alkali treatment is to immerse the skin-core structure fiber in 0.5-1.5 wt% sodium hydroxide solution at 90-100 ℃ according to the bath ratio of 1:30-40, and perform ultrasonic oscillation treatment for 1-2 h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114753022A (en) * | 2022-03-23 | 2022-07-15 | 合肥工业大学 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
| CN114934320A (en) * | 2022-05-20 | 2022-08-23 | 北京森海氧源科技有限公司 | Negative ion graphene antibacterial and bacteriostatic polyester fiber equipment and preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753022A (en) * | 2022-03-23 | 2022-07-15 | 合肥工业大学 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
| CN114753022B (en) * | 2022-03-23 | 2023-06-27 | 合肥工业大学 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
| CN114934320A (en) * | 2022-05-20 | 2022-08-23 | 北京森海氧源科技有限公司 | Negative ion graphene antibacterial and bacteriostatic polyester fiber equipment and preparation method |
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